CN109403994A - A kind of driving engineering method for slurry balance shield machine - Google Patents
A kind of driving engineering method for slurry balance shield machine Download PDFInfo
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- CN109403994A CN109403994A CN201811645964.6A CN201811645964A CN109403994A CN 109403994 A CN109403994 A CN 109403994A CN 201811645964 A CN201811645964 A CN 201811645964A CN 109403994 A CN109403994 A CN 109403994A
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- shield machine
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- 239000002002 slurry Substances 0.000 title claims abstract description 44
- 238000012407 engineering method Methods 0.000 title claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 260
- 239000002893 slag Substances 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 10
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 7
- 206010011376 Crepitations Diseases 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009991 scouring Methods 0.000 abstract 1
- 108010066114 cabin-2 Proteins 0.000 description 20
- 108010066278 cabin-4 Proteins 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000005641 tunneling Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention provides a kind of driving engineering method for slurry balance shield machine, includes the following steps: the soil properties for detecting shield driving region；Whether stable judge the soil properties, if it is not, then closing each valve on soil cabin pressure-retaining system and soil cabin air inlet pipeline, so as to be full of mud in soil cabin, that is, uses normal boring mode；If so, opening each valve on the soil cabin pressure-retaining system and the soil cabin air inlet pipeline, make soil cabin top compressed air, then cutterhead is washed away by soil cabin top inlet pipe.The above-mentioned driving engineering method for slurry balance shield machine keeps cutterhead scouring effect more preferable using two kinds of boring modes of normal mode and soil cabin aerating, effectively solves cutterhead incrusted problem when slurry balance shield machine tunnels in stickiness soil layer.
Description
Technical field
The present invention relates to slurry balance shield machine technical fields, are used for slurry balance shield more specifically to one kind
The driving engineering method of machine.
Background technique
With the fast development of Shield Construction Technique, the slurry balance shield machine in shield excavation machine is with its excellent pressure
Control performance has obtained relatively broad application in crossing river and sea and the Tunnel Engineering having higher requirements to sedimentation etc., with this
Meanwhile excavating characteristic also causes it when excavating cohesive soil stratum, cutterhead is easy mud lining, in addition via soil cabin inlet pipe to soil
The mud injected in cabin is directly flushed in soil cabin mud so that streaming rate slows down, can not to stasis in the mud cake on cutter into
Row effectively cleaning, this allows for shield excavation machine after tunneling a distance, it has to driving process is interrupted, to cutterhead and cutter
On the walk that adheres carry out flush clean, so, not only the scavenging period of cutterhead is long but also intermittent rinses seriously shadow
It rung excavation progress, reduced drivage efficiency.
Therefore, the cleaning effect of cutterhead when how to effectively improve driving solves the incrusted problem of cutterhead, is this field
The technical issues of technical staff's urgent need to resolve.
Summary of the invention
The object of the present invention is to provide a kind of driving engineering methods for slurry balance shield machine, using normal mode and soil cabin
Two kinds of boring modes of aerating realize to the alternate scour of cutterhead outer region, solve that cutterhead cleaning effect is bad, knot significantly
The problem of mud cake.
The present invention provides a kind of driving engineering method for slurry balance shield machine, includes the following steps:
Detect the soil properties in shield driving region, wherein the soil properties specifically include: soil layer stickiness, soil layer are certainly
Stability and fault belt；
Whether stable the soil properties are judged, if it is not, then closing each on soil cabin pressure-retaining system and soil cabin air inlet pipeline
Valve washes away cutterhead by soil cabin inlet pipe so as to be full of mud in soil cabin；If so, opening the soil cabin pressure maintaining
Each valve in system and the soil cabin air inlet pipeline, makes soil cabin top compressed air, by soil cabin inlet pipe to institute
Cutterhead is stated to be washed away.
Compared with above-mentioned background technique, the driving engineering method provided by the present invention for slurry balance shield machine, by right
The soil properties such as soil layer stickiness, soil layer autostability and fault belt for tunneling region are detected, and judge soil layer with this
The stability of characteristic: it if judging result is that soil properties are unstable, then closes on soil cabin pressure-retaining system and soil cabin air inlet pipeline
Each valve, mud is filled into soil cabin by soil cabin inlet pipe so that soil cabin in be full of mud, in the process, realize pair
Cutterhead outer region is washed away, into normal boring mode to maintain face Water And Earth Pressures to balance；If judging result
Stablize for soil properties, then each valve on soil cabin pressure-retaining system and soil cabin air inlet pipeline is opened, so that in soil cabin upper area
Gassy, namely soil cabin aerating mode is used, using soil cabin inlet pipe to being washed away in the outer region of cutterhead.Thus may be used
See, start the soil properties that the present invention before tunneling passes through detection shield driving region, to judge using conventional boring mode, still
It is tunneled using soil cabin aerating boring mode, so, in tunneling process, by the continuous detection to soil properties,
Mutually switched using conventional boring mode and soil cabin aerating driving both of which, just can be improved cutterhead in this way and wash away effect
Fruit effectively solves the incrusted problem of cutterhead, promotes drivage efficiency.
Preferably, the soil properties are unstable specifically: soil layer is the self-stabilization of non-cohesive soil and/or the soil layer
Property is poor and/or the soil layer there are crackles；
The soil properties are stablized specifically: the soil layer is cohesive soil, the autostability of the soil layer is good and described
Crackle is not present in soil layer.
Preferably, whether described to judge the soil properties stable, if it is not, then closing soil cabin pressure-retaining system and soil cabin air inlet
After each valve on pipeline, further includes:
Open each valve on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline；
The outer region of the cutterhead is washed away by the soil cabin inlet pipe and air cushion cabin inlet pipe.
Preferably, whether described to judge the soil properties stable, if so, opening the soil cabin pressure-retaining system and described
After each valve on soil cabin air inlet pipeline, further includes:
Open each valve on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline；
The outer region of the cutterhead is washed away by the soil cabin inlet pipe and air cushion cabin inlet pipe.
Preferably, after each valve opened on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline,
Further include:
The relief valve on the soil cabin air inlet pipeline is monitored, when the actual pressure value that the relief valve is shown is higher than default let out
When pressure value, adjusts the relief valve and carry out pressure discharge operations.
Preferably, each valve opened on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline, is also wrapped
It includes:
Whether monitoring soil cabin pressure sensor fluctuates exception: if soil cabin pressure sensor fluctuation is abnormal, closing institute
Each valve on soil cabin pressure-retaining system and the soil cabin air inlet pipeline is stated, makes soil cabin full of mud.
Preferably, after whether the monitoring soil cabin pressure sensor fluctuates exception, further includes:
Judge whether the practical slag discharge amount of shield machine and theoretical slag discharge amount are equal: if the practical slag discharge amount of the shield machine
When less than the theoretical slag discharge amount, then the shield machine driving speed or shutdown are reduced, it will be in the soil cabin using circulation system
Portion's dregs is taken out of, and a large amount of dregs is prevented to be deposited in the soil cabin or the air cushion cabin；If the described of the shield machine is actually slagged tap
When amount is greater than the theoretical slag discharge amount, then judge whether backbreak because the soil layer is unstable when driving: if the soil
Layer stablizes the boring mode then continued using soil cabin aerating；If the soil layer is unstable, the soil cabin is made to be full of mud, with
It prevents face collapsing or phenomenon of backbreaking occurs.
Preferably, described to judge whether the soil properties are stable specifically: using Advance Drilling equipment to being in after excavation
The soil layer in taper radial extent is detected, or the artificial entrance with pressure soil cabin judges the soil layer,
Or boring coring is carried out from ground and is judged.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the flow chart of the driving engineering method provided by the present invention for slurry balance shield machine；
The structural schematic diagram of direct control type routine boring mode provided by Fig. 2 embodiment of the present invention；
Fig. 3 is the structural schematic diagram of direct control type soil cabin aerating boring mode provided by the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of direct control type pressure maintaining, air inlet and pressure relief equipment provided by the embodiment of the present invention；
Fig. 5 is the structural schematic diagram that formula routine boring mode is indirectly controlled provided by the embodiment of the present invention；
Fig. 6 is the structural schematic diagram that formula soil cabin aerating boring mode is indirectly controlled provided by the embodiment of the present invention；
Fig. 7 is the structural schematic diagram that formula pressure maintaining, air inlet and pressure relief equipment are indirectly controlled provided by the embodiment of the present invention；
Wherein, 1- cutterhead, 2- soil cabin, 3- soil cabin pressure sensor, 4- air cushion cabin, 5- air cushion lock pressure force snesor, 6- soil
Cabin air inlet pipeline, 601- pressure gauge, the first valve of 602-, the second valve of 603-, 7- soil cabin pressure-retaining system, 8- pressure relief pipe,
801- relief valve, 802- vent pressure table, 9- soil cabin inlet pipe, 10- air cushion cabin inlet pipe, 11- air cushion cabin pressure-retaining system, 12-
Air cushion cabin air inlet pipeline, 121- third valve, 122- pressure gauge, 13- into slurry booster pump.
Specific embodiment
In order to make those skilled in the art more fully understand the present invention program, with reference to the accompanying drawing and it is embodied
The present invention is described in further detail for mode.
FIG. 1 to FIG. 7 is please referred to, Fig. 1 is the process of the driving engineering method provided by the present invention for slurry balance shield machine
Figure；The structural schematic diagram of direct control type routine boring mode provided by Fig. 2 embodiment of the present invention；Fig. 3 is that the present invention is implemented
The structural schematic diagram of direct control type soil cabin aerating boring mode provided by example；Fig. 4 is straight provided by the embodiment of the present invention
Connect the structural schematic diagram of the pressure maintaining of control formula, air inlet and pressure relief equipment；Fig. 5 is normal to indirectly control formula provided by the embodiment of the present invention
Advise the structural schematic diagram of boring mode；Fig. 6 is to indirectly control formula soil cabin aerating boring mode provided by the embodiment of the present invention
Structural schematic diagram；Fig. 7 is the structural representation that formula pressure maintaining, air inlet and pressure relief equipment are indirectly controlled provided by the embodiment of the present invention
Figure.
The present invention provides a kind of driving engineering method for slurry balance shield machine, mainly includes the following steps:
S11, the soil properties for detecting shield driving region, wherein soil properties specifically include: soil layer stickiness, soil layer are certainly
Stability and fault belt；
Whether S21, to judge soil properties stable, if it is not, then follow the steps S41, close soil cabin pressure-retaining system 7 and soil cabin into
Each valve on air pipe 6 is rushed so as to be full of mud in soil cabin 2 by outer region of the soil cabin inlet pipe 6 to cutterhead 1
Brush, namely cutterhead 1 is washed away using conventional boring mode；If so, then follow the steps S31, open soil cabin pressure-retaining system 7 and
Each valve on soil cabin air inlet pipeline 6, so that soil cabin top is full of compressed air, by soil cabin inlet pipe 6 to the periphery of cutterhead 1
Region is washed away.
That is, carrying out non-stickiness, autostability difference and there are when crackle or broken, fracture soil layer driving, with normal
Boring mode is advised, that is, closing each valve on soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6, that is to say, that protect soil cabin
Pressure system 7 is closed, while will lead to the first valve 602 in soil cabin 2 on soil cabin air inlet pipeline 6 and the second valve 603 is closed, and is made
It obtains and is full of mud in soil cabin 2, cutterhead of the mud to direct control type slurry balance shield machine of injection is rushed using soil cabin inlet pipe 9
1 is washed away.
On this basis, in order to solve the deficiency of conventional boring mode, existing driving engineering method and cutterhead punching are further improved
Technology is washed, in the high soil layer driving of progress stickiness soil layer and autostability, soil cabin aerating boring mode is switched to rapidly, passes through
Each valve on soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6 is opened, that is, soil cabin pressure-retaining system 7 is opened, soil cabin air inlet
First valve 602 and the second valve 603 are opened on pipeline 6, straight to carrying out in the outer region of cutterhead 1 using soil cabin inlet pipe 9
It connects and washes away, thus avoid the low problem of flush efficiency caused by intermittent flushing cutterhead 1, preferably solve stickiness stratum
The incrusted problem of cutterhead 1 when driving is realized to blow mud cake of the knot in cutterhead 1 that become silted up energetically and be penetrated, until by mud cake removal.
It can be seen that the driving engineering method according to the present invention for slurry balance shield machine, is applicable to formation characteristics
The alternately operating condition of variation, and boring mode can be switched rapidly in stability and stickiness Different Strata, the flushing of cutterhead 1 is suitable
Freely effectively, and it is beneficial to save the scavenging period of cutterhead 1, improves shield driving efficiency, reduces construction cost, raising shield effect
Rate.
The stability of above-mentioned soil properties detects, and can use Advance Drilling equipment and realizes to radiation model tapered after excavation
Soil layer in enclosing carries out detection feedback, manually with pressure can also judge into soil cabin 2 stratum, or bored from ground
It visits coring to be judged, be prepared with finding out shield driving section soil properties in advance and carrying out driving in advance.Certainly, soil properties
Stability detection can also visually be completed by staff.
Specifically, the above-mentioned unstable judgment criteria to soil properties are as follows: detection soil layer is non-cohesive soil, and/or,
The autostability of soil layer is poor, and/or, there are crackles, broken and crack conditions for soil layer, that is to say, that above-mentioned any one when occurring
When kind or a variety of situations, show that the soil properties elicited are unstable, direct control type slurry balance shield machine can be using soil
Cabin inlet pipe 9 is to the conventional boring mode inside soil cabin 2 into slurry.
The above-mentioned stable judgment criteria to soil properties are as follows: detection soil layer is the autostability of cohesive soil and soil layer
There is no crackles, broken and crack conditions for good and soil layer, that is to say, that when the soil layer of detection is provided simultaneously with above situation,
May determine that the soil properties at this are stablized, direct control type slurry balance shield machine can use the mode of soil cabin aerating,
1 upper area of cutterhead is washed away.
In order to be suitable for indirectly controlling formula slurry balance shield machine, in step: judge whether soil properties are stable, if it is not,
It then closes after each valve on soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6, further includes:
Open each valve on air cushion cabin pressure-retaining system 11 and air cushion cabin air inlet pipeline 12；
The outer region of cutterhead 1 is washed away by soil cabin inlet pipe 9 and air cushion cabin inlet pipe 10.
That is, when soil properties are determined as unstable, can above-mentioned closing soil cabin pressure-retaining system 7 and soil cabin into
After the step of each valve on air pipe 6, each valve on air cushion cabin pressure-retaining system 11 and air cushion cabin air inlet pipeline 12 is opened,
Namely, it is ensured that each valve on soil cabin air inlet pipeline 6 is in closed state, at the same time, opens air cushion cabin pressure-retaining system 11
And each valve on air cushion cabin air inlet pipeline 12, pressure gauge 601 monitor pressure maintaining setting value, lead in air cushion cabin 4 that is, opening
Third valve 121 on air cushion cabin air inlet pipeline 12,122 real-time monitoring air inlet pressure force value of pressure gauge.Therefore, using indirectly controlling
When formula slurry balance shield machine, while opening air cushion cabin pressure-retaining system 11, each valve on air cushion cabin air inlet pipeline 12 is opened
Door, maintains face pressure balance to adjust the gas pressure in air cushion cabin 4, be pressurized during this by starting into slurry
Pump 13, is washed away by outer region of the air cushion cabin inlet pipe 10 to 1 top of cutterhead.
It should be noted that above-mentioned soil cabin pressure-retaining system 7 and air cushion cabin pressure-retaining system 11, can be the shared same guarantor
Pressure system, or individual pressure-retaining system.
In addition, when soil properties are determined as stable state, on opening soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6
Each valve after, further includes:
Open each valve on air cushion cabin pressure-retaining system 11 and air cushion cabin air inlet pipeline 12；
By soil cabin inlet pipe 9 and air cushion cabin inlet pipe 10 to being washed away in the outer region of cutterhead 1.
That is, before being washed away to the cutterhead for indirectly controlling formula slurry balance shield machine, when soil properties are determined as surely
Periodically, air cushion can further be opened after each valve on above-mentioned unlatching soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6
Each valve on the gentle dunnage air inlet pipeline 12 of cabin pressure-retaining system 11, that is, will lead in soil cabin 2 in soil cabin air inlet pipe 6 the
One valve 602 automatically turns on, pressure value in 601 real-time monitoring soil cabin air inlet pipeline 6 of pressure gauge, and further opens and lead to air cushion
The third valve 121 on air cushion cabin air inlet pipeline 12 in cabin 4, in 122 real-time monitoring air cushion cabin air inlet pipeline 12 of pressure gauge into
Air pressure force value realizes into the gentle dunnage of soil cabin 24 double cabins inflation boring modes simultaneously, by soil cabin inlet pipe 9 and air cushion cabin into
Slurry pipe 10 in the outer region of cutterhead 1 to washing away；Above-mentioned soil cabin pressure-retaining system 7 can be phase with air cushion cabin pressure-retaining system 11
Same pressure-retaining system, or different pressure-retaining systems.So set, may be implemented when soil properties are stablized, to indirect
Control formula slurry balance shield machine knife disk 1 is washed away.
In order to realize to safety relief is carried out in soil cabin 2 or air cushion cabin 4, open air cushion cabin pressure-retaining system 11 and air cushion cabin into
After each valve on air pipe 12, further includes: the relief valve 801 on monitoring soil cabin air inlet pipeline 6, when relief valve 801 is shown
Actual pressure value when being higher than default pressure release value, adjust the relief valve 801 and carry out pressure discharge operations.
Specifically, on shield body partition or rear bulkhead be provided with pressure relief pipe 8,8 one end of pressure relief pipe protrude into soil cabin 2 or
Air cushion cabin 4, one end connect atmospheric pressure, are equipped with relief valve 801 and vent pressure table 802 on pressure relief pipe 8；When the pressure maintaining of air cushion cabin
When each valve in system 11 and air cushion cabin air inlet pipeline 12 is in open state, need to monitor vent pressure table 802, with right
Pressure value carries out real-time monitoring in pressure relief pipe 8, and relief valve 801 is previously stored with default pressure release value, presets pressure release value according to shield
Structure parameter and calculated value setting, vent pressure table 802 carries out real-time monitoring to pressure value in pressure relief pipe 8, when soil cabin 2 or air cushion
When pressure value is higher than the pressure release value that relief valve 801 is set in cabin 4, adjusts relief valve 801 and carry out pressure release, make soil cabin 2 or air cushion cabin 4
Interior pressure value drops to pressure release value or hereinafter, so that maintains stable pressure state inside soil cabin 2 or air cushion cabin 4.
It, should also be abnormal to the pressure oscillation inside two cabins while carrying out pressure monitor to soil cabin 2 and air cushion cabin 4
Situation is monitored, and specifically executes following steps:
Whether monitoring soil cabin pressure sensor 3 and air cushion lock pressure force snesor 5 fluctuate exception: if soil cabin pressure sensor 3
Fluctuation is abnormal, then closes each valve on soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6；If air cushion lock pressure force snesor 5 fluctuates
It is abnormal, then each valve on air cushion cabin pressure-retaining system 11 and air cushion cabin air inlet pipeline 12 is closed, so that soil cabin 2 is full of mud, into
Enter conventional boring mode；If soil cabin pressure sensor 3 and air cushion lock pressure force snesor 5 fluctuate exception, by soil cabin positive system
System 7 and each valve on soil cabin air inlet pipeline 6 and each valve on air cushion cabin pressure-retaining system 11 and air cushion cabin air inlet pipeline 12
It simultaneously closes off.
That is, when in soil cabin pressure sensor 3 and air cushion lock pressure force snesor 5 any one or both send out
When raw fluctuation exception, shield is adjusted to conventional boring mode.To soil cabin pressure sensor 3 and air cushion lock pressure force snesor 5
Unusual fluctuations situation be monitored after, it is also necessary to judge whether to stop shield driving, sentence that is, carrying out shield driving mode
It is disconnected.
Specifically, judge whether the practical slag discharge amount of shield machine and theoretical slag discharge amount are equal: if shield machine is actually slagged tap
It when amount is less than theoretical slag discharge amount, then reduces shield machine driving speed or stops shield machine driving, using circulation system by soil cabin
Internal dregs is taken out of, and a large amount of dregs is prevented to be piled up in soil cabin or air cushion cabin；If the practical slag discharge amount of shield machine is slagged tap greater than theory
When amount, then judge whether backbreak because soil layer is unstable when driving, continues if soil layer is stablized using soil cabin aerating mould
Formula is tunneled, that is, each valve on soil cabin pressure-retaining system 7 and soil cabin air inlet pipeline 6 is opened, so that 2 top of soil cabin is pressure
Contracting air；If soil layer is unstable, stop the aerating into soil cabin 2, so that soil cabin 2 is full of mud, that is, using normal mode
Driving, to prevent face collapsing or phenomenon of backbreaking occur.
When carrying out the judgement of shield driving mode, can also be set by driving distance in the boring parameter of setting or auxiliary
Standby working order etc. judges whether to stop shield driving, dig when in the practical driving distance of Suporting structure and the boring parameter of setting
When into apart from almost the same, remaining equipment and normal auxiliary equipment running, continue shield driving；When Suporting structure it is practical driving away from
Shield machine speed or knot are then reduced when perhaps ancillary equipment operating is abnormal from driving distance in the boring parameter much smaller than setting
Beam shield driving；When driving distance in boring parameter of the practical driving distance of Suporting structure much larger than setting, then executes and go out
The identical step of the quantity of slag.
When shield stops tunneling, shield machine is in pressure maintaining mode, at this point, direct control type slurry balance shield machine utilizes
Soil cabin pressure-retaining system 7 continues the slip casting into soil cabin 2 by actual setpoint and then adopts if indirectly controlling formula slurry balance shield machine
With air cushion cabin pressure-retaining system 11, continue to supply into air cushion cabin 4 according to actual setpoint.It is above-mentioned to soil cabin 2 continue slip casting or to
Air cushion cabin 4 persistently supplies, and is for guaranteeing pressure and face Water And Earth Pressures balance in soil cabin 2, prevents face from collapsing.
For the safety for reducing construction risk, ensuring shield driving operation, need to need to switch to detection feedback in driving
Before the soil layer of mode, boring mode switching is carried out in advance, to avoid between soil cabin aerating boring mode and conventional boring mode
The delay of switching.
In conclusion the present invention is tunneled using double mode and flushing method, cutterhead is uninterruptedly rinsed, it is specific to execute
Following steps:
Step 1: starting shield machine and ancillary equipment are opened and are set into slurry booster pump and its auxiliary equipment parameter value, row
Starch booster pump and its auxiliary equipment parameter value, it is ensured that each normally opened valve is opened, normal closed gate is closed, each route of pipe line is unimpeded
Deng；
Step 2: real-time monitoring Suporting structure operating parameter, for example, monitoring each electric equipment operation parameter, circulation system
The operating parameters of parameter, pressure sensor value of feedback, pressure maintaining and auxiliary system setting value, cutterhead 1；Wherein, circulation parameter includes
Into/plasma discharge flow, along pipeline pressure monitor value and into/plasma discharge mud parameter；Pressure sensor value of feedback includes pressure in soil cabin 2
Value, if indirectly controlling formula slurry balance shield machine further includes the pressure value in air cushion cabin 4；1 operating parameters of cutterhead include cutterhead
Revolving speed, cutter head torque, driving speed, gross thrust；
Step 3: soil layer in the range of radiation tapered after excavation face is carried out using Advance Drilling and ancillary equipment real
When detection feedback, find out shield driving section soil properties in advance and carry out in advance driving prepare；
Step 4: when detecting soil layer self-stability difference or having fault belt etc., direct control type slurry balance shield
Machine and indirectly control formula slurry balance shield machine be all made of normal mode driving, in the process, pass through the mud injected in soil cabin 2
Slurry stream washes away cutterhead 2；Good or whens without fault belt etc. when detecting soil layer self-stability, direct control type muddy water is flat
It weighing apparatus shield machine and indirectly controls formula slurry balance shield machine and opens soil cabin aerating boring mode, and cutterhead is washed away in realization；
Step 5: the pressure value of monitoring soil cabin pressure sensor 3 and air cushion lock pressure force snesor 5 sees whether to fluctuate different
Often, fluctuation abnormal conditions are adjusted, shield are adjusted in time to conventional boring mode；
Step 6: pass through driving distance in the boring parameter of setting or ancillary equipment working order or plasma discharge amount etc., judgement
Whether stop shield driving, judge whether to stop shield driving: when the practical driving distance of Suporting structure is much smaller than described in setting
In boring parameter when driving distance, shield stops driving, so that shield is in pressure maintaining mode.
By above-mentioned steps, it is mutual in conventional boring mode and soil cabin aerating boring mode both of which that shield may be implemented
Switching meets the operating condition that formation characteristics alternately changes, and when opening soil cabin aerating boring mode, the slurries of inlet pipe injection can be straight
It connects and cutterhead at top about 1/3 is washed away in real time, cutterhead incrusted problem when can be well solved stickiness stratum driving.
The driving engineering method provided by the present invention for slurry balance shield machine is described in detail above.Herein
Apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help
Understand method and its core concept of the invention.It should be pointed out that for those skilled in the art, not taking off
, can be with several improvements and modifications are made to the present invention under the premise of from the principle of the invention, these improvement and modification also fall into this
In invention scope of protection of the claims.
Claims (8)
1. a kind of driving engineering method for slurry balance shield machine, which comprises the steps of:
Detect the soil properties in shield driving region, wherein the soil properties specifically include: soil layer stickiness, soil layer self-stabilization
Property and fault belt；
Whether stable judge the soil properties, if it is not, each valve on soil cabin pressure-retaining system and soil cabin air inlet pipeline is then closed,
So as to be full of mud in soil cabin；If so, each valve on the soil cabin pressure-retaining system and the soil cabin air inlet pipeline is opened, with
Make soil cabin top compressed air, is washed away by outer region of the soil cabin inlet pipe to cutterhead.
2. the driving engineering method according to claim 1 for slurry balance shield machine, which is characterized in that the soil properties
It is unstable specifically: soil layer be that the autostability of non-cohesive soil and/or the soil layer is poor and/or the soil layer there are crackles；
The soil properties are stablized specifically: the soil layer is cohesive soil, the autostability of the soil layer is good and the soil layer
There is no crackles.
3. the driving engineering method according to claim 1 for slurry balance shield machine, which is characterized in that described in the judgement
Whether soil properties are stable, if it is not, then closing after each valve on soil cabin pressure-retaining system and soil cabin air inlet pipeline, further includes:
Open each valve on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline；
The outer region of the cutterhead is washed away by the soil cabin inlet pipe and air cushion cabin inlet pipe.
4. the driving engineering method according to claim 3 for slurry balance shield machine, which is characterized in that described in the judgement
Whether soil properties are stable, if so, after opening each valve on the soil cabin pressure-retaining system and the soil cabin air inlet pipeline,
Further include:
Open each valve on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline；
The outer region of the cutterhead is washed away by the soil cabin inlet pipe and air cushion cabin inlet pipe.
5. the driving engineering method according to claim 4 for slurry balance shield machine, which is characterized in that described in the unlatching
After each valve on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline, further includes:
The relief valve on the soil cabin air inlet pipeline is monitored, when the actual pressure value that the relief valve is shown is higher than default pressure release value
When, it adjusts the relief valve and carries out pressure discharge operations.
6. the driving engineering method according to claim 4 for slurry balance shield machine, which is characterized in that described in the unlatching
Each valve on air cushion cabin pressure-retaining system and air cushion cabin air inlet pipeline, further includes:
Whether monitoring soil cabin pressure sensor fluctuates exception: if soil cabin pressure sensor fluctuation is abnormal, closing the soil
Each valve on cabin pressure-retaining system and the soil cabin air inlet pipeline, so that the soil cabin is full of mud.
7. the driving engineering method according to claim 6 for slurry balance shield machine, which is characterized in that the monitoring soil cabin
Whether pressure sensor fluctuates after exception, further includes:
Judge whether the practical slag discharge amount of shield machine and theoretical slag discharge amount are equal: if the practical slag discharge amount of the shield machine is less than
When the theory slag discharge amount, then the shield machine driving speed or shutdown are reduced, using circulation system by slag inside the soil cabin
Soil zone goes out, and a large amount of dregs is prevented to be deposited in the soil cabin or the air cushion cabin；If the practical slag discharge amount of the shield machine is big
When the theoretical slag discharge amount, then judge whether backbreak because the soil layer is unstable when driving: if the soil layer is steady
Rule continues the boring mode using soil cabin aerating；If the soil layer is unstable, make the soil cabin full of mud, to prevent
There is phenomenon of backbreaking in face collapsing.
8. the driving engineering method according to claim 1 for slurry balance shield machine, which is characterized in that described in the judgement
Whether soil properties are stable specifically: are carried out using Advance Drilling equipment to the soil layer in radial extent tapered after excavation
Detection, it is perhaps manually with pressure that the soil layer is judged into the soil cabin or is sentenced from ground progress boring coring
It is disconnected.
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| CN201811645964.6A CN109403994B (en) | 2018-12-29 | 2018-12-29 | Tunneling construction method for slurry balance shield machine |
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|---|---|---|---|
| CN201811645964.6A CN109403994B (en) | 2018-12-29 | 2018-12-29 | Tunneling construction method for slurry balance shield machine |
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| CN112539065A (en) * | 2020-12-02 | 2021-03-23 | 广东电网有限责任公司佛山供电局 | Monitoring system and method for stability of pipe jacking excavation surface |
| CN113482054A (en) * | 2021-07-13 | 2021-10-08 | 上海隧道工程有限公司 | Active press-in type vertical shaft construction system and method suitable for soft soil area |
| CN113685730A (en) * | 2021-07-12 | 2021-11-23 | 中铁建华南建设有限公司 | Air supply structure for pressure maintaining system and earth pressure balance shield machine |
| CN113818899A (en) * | 2021-09-18 | 2021-12-21 | 上海隧道工程有限公司 | Earth pressure balance muddy water conveying type planet single-cutter-disc square push bench and construction method thereof |
| CN113863943A (en) * | 2021-10-12 | 2021-12-31 | 中建八局轨道交通建设有限公司 | Pressure maintaining method for long-time halt of slurry balance shield after matched disassembly and assembly |
| CN114109412A (en) * | 2021-11-30 | 2022-03-01 | 中铁一局集团有限公司 | Slurry shield circulation system and method based on double crushers and double slurry discharge channels |
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| CN114109412B (en) * | 2021-11-30 | 2024-05-10 | 中铁一局集团有限公司 | Slurry shield circulation system and method based on double crushers and double slurry channels |
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